Similar to 短縮URL

Transifex

Tripod (web hosting)

.tt

Tumblr

.tv

.tw

Typepad

.ua

.ug

.uk

Urchin (software)

.uy

.uz

.vc

.ve

.vg

Virtual private network

Visual.ly

.vn

.vu

Vyatta

VyOS

Web Accessibility Initiative

Web application firewall

WHATWG